Julius Caesar and Pompey the Great were rivals for the position of First Consul of Rome. They spoke before the Senate, putting forward their cases for election to the post, by recounting their deeds in the service of Rome.
“When the Gauls attacked Rome, I defended the city,” Pompey said, “and drove them out killing 100,000 Gauls.”
“I invaded Gaul,” Caesar said, “and I too slew 100,000 Gauls.”
So the Senate gave the position to Caesar because in Europe away Gauls count double.